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rustc_lint: Prevent multiple 'lint ignored' lints

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Prevent multiple 'ignored unless specified at crate level' lints. The
multiplication happens because we run the same lint three times:
* In BuiltinCombinedEarlyLintPass
* In BuiltinCombinedPreExpansionLintPass
* In shallow_lint_levels_on

Only run the lint one time by checking the `lint_added_lints` bool.
This commit is contained in:
Martin Nordholts 2023-12-28 18:03:16 +01:00
parent eef02c453f
commit e0c626fbbc
3 changed files with 4 additions and 58 deletions
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2
compiler/rustc_lint/src/levels.rs
View File

@ -1029,7 +1029,7 @@ fn add(&mut self, attrs: &[ast::Attribute], is_crate_node: bool, source_hir_id:
}
}
if !is_crate_node {
if self.lint_added_lints && !is_crate_node {
for (id, &(level, ref src)) in self.current_specs().iter() {
if !id.lint.crate_level_only {
continue;

6
tests/ui/lint/crate_level_only_lint.rs
View File

@ -3,20 +3,14 @@
mod foo {
#![allow(uncommon_codepoints)]
//~^ ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
//~| ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
//~| ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
#[allow(uncommon_codepoints)]
//~^ ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
//~| ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
//~| ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
const BAR: f64 = 0.000001;
}
#[allow(uncommon_codepoints)]
//~^ ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
//~| ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
//~| ERROR allow(uncommon_codepoints) is ignored unless specified at crate level [unused_attributes]
fn main() {
}

54
tests/ui/lint/crate_level_only_lint.stderr
View File

@ -11,64 +11,16 @@ LL | #![deny(uncommon_codepoints, unused_attributes)]
| ^^^^^^^^^^^^^^^^^
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:9:9
--> $DIR/crate_level_only_lint.rs:7:9
|
LL | #[allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:17:9
--> $DIR/crate_level_only_lint.rs:13:9
|
LL | #[allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:4:10
|
LL | #![allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:9:9
|
LL | #[allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:17:9
|
LL | #[allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:4:10
|
LL | #![allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:9:9
|
LL | #[allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: allow(uncommon_codepoints) is ignored unless specified at crate level
--> $DIR/crate_level_only_lint.rs:17:9
|
LL | #[allow(uncommon_codepoints)]
| ^^^^^^^^^^^^^^^^^^^
|
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: aborting due to 9 previous errors
error: aborting due to 3 previous errors